DoD Data Destruction Standards: Complete DoD 5220.22 M Data Wipe Method

Every day, millions of people sell laptops, upgrade their office computers, give away hard drives, or throw away storage media expecting that file deletion will permanently delete their files. The truth is that many deleted files remain recoverable. Cybercriminals, forensic investigators, and even free recovery utilities can easily retrieve files such as private emails, financial information, passwords, business documents, and customer databases from hard drives that have not been properly wiped clean. Because of the increased risk of data recovery, adhering to DoD data destruction standards is an extremely high priority for many businesses, government agencies, medical facilities, and even individuals who deal with sensitive data. Consequently, there is currently a significant increase in organizations searching for reliable DoD data wipe standards for permanently sanitizing storage media before disposal or reuse.

What are DoD Data Destruction Standards?

DoD data destruction standards refer to secure methods used to sanitize data to permanently delete sensitive and protected information from storage devices. It was established by the U.S. Department of Defense to ensure data which has been classified or confidential cannot be accessed after deletion from hard drives or other media.

The most commonly accepted and recognized method is called the DoD 5220.22-M data wipe method, or as it is commonly known, the Department of Defense data destruction standard, or US DoD data wipe standard.

The purpose of the DoD data destruction standards is to overwrite/block every addressable storage sector with specific binary patterns, rendering all information previously stored on the device unrecoverable. Over the years, this method has been recognized globally as a method for military grade sanitisation, and has been widely embraced by companies, government agencies, financial institutions, health care providers and educational institutions.

Why the Traditional DoD 5220.22-M Data Wipe Standard is Not Secure

Many users now think that once they delete a file from their computer or format their hard drive, all information is gone forever. In fact, when you delete a file on an operating system, all that happens is that an entry for the file is removed from the directory structure of the file system; the actual data remains on the device until it is overwritten.

This means it is possible to recover a deleted file using data recovery software as long as the storage sectors have not been overwritten.

The implications of this are as follows:

• Emails that have been deleted can still be recovered
• Moreover, financial records can still be accessible
• Password databases can still exist
• Business documents may still be recoverable
• Additionally, customer personal information could be publicly available

The improper disposal of storage devices also creates liability for businesses and organizations, including:

• Data breaches
• Regulatory fines
• Identity theft
• Financial fraud
• Intellectual property theft
• Compliance violations

So, that’s why many organizations follow the DoD data destruction standards for secure disposal of devices and for the sanitization of storage devices.

Understanding the DoD Data Wipe Method

The DoD 5220.22-M data wipe method of data wiping has been recognized as one of the most used methods in modern DoD data destruction standards.

Rather than simply deleting file references, this method securely overwrites each addressable storage sector on multiple occasions with pre-determined binary patterns.

Initially, the Department of Defense developed this methodology due to the potential for traditional magnetic hard drives to hold microscopic amounts of previously written data after an overwrite.

Furthermore, the Department of Defense data destruction standard introduced a set of multi-pass overwriting procedures.

DoD 5220.22-M 3-Pass Method

The standard 3-pass overwrite process is the most commonly used DoD data wipe standard.

To perform a 3-pass overwrite, the following three things will occur:

• Pass 1 – Binary Zero Overwrite: All sectors of data on the HDD will be converted to binary zeroes (0’s) by the software program.
• Pass 2 – Binary One Overwrite: All sectors of data on the HDD will be converted to binary ones (1’s) by the software program.
• Pass 3 – Random Overwrite: The software program will write random characters throughout the entire HDD.

Verification

The software will verify that the overwriting of data was successful; meaning that after the overwriting of data has taken place, it will confirm that the aforementioned overwriting was performed correctly.

This method has been widely recognized as an effective means to destroy data on magnetic hard disk drives in accordance with DoD data destruction standards.

DoD 5220.22-M ECE 7-Pass Method

The extended DoD 5220.22-M ECE method is developed to provide an improved 7 pass overwriting method for use in higher security environments.

The overwriting method will consist of:

• Pass 1:  Overwrite with zeroes
• Pass 2: Overwrite with ones
• Pass 3: Overwrite with random data
• Pass 4: Overwrite with zeroes
• Pass 5: Overwrite with zeroes again
• Pass 6: Overwrite with ones
• Pass 7: Overwrite with random data

Verification of the wiping process is conducted for successful sanitization of the data.

As a result of overwriting each disk sector multiple times, the wiping process can take many hours based on the size of the disk drive and performance of the hardware.

Why DoD Data Destruction Standards Became Popular

Over the years the DoD data destruction standards has established itself as a leader in providing an established and repeatable model for securely cleaning up data.

However, these procedures provided businesses with:

• Secure Overwrite Procedures
• Multiple pass sanitization
• Verification Mechanisms
• Reliable Hard Drive Sanitization
• Minimised Risks of Data Recovery

Because of these benefits, DoD data wiping became synonymous with high-end enterprise security.

Additionally, many businesses continue to utilise DoD data destruction standards when metropolitan and traditional hard drives have reached their end of life.

Benefits of DoD Data Destruction Standards

1. Secure Data Wiping

However, the main benefit of the DoD data destruction standards is the secure wiping of all sensitive data stored on hard drives.

2. Support for Compliance

Companies utilize Department of Defense data destruction standard in order to meet compliance requirements set forth by:

• HIPAA (Health Insurance Portability and Accountability Act)
• GDPR (General Data Protection Regulation)
• PCI DSS (Payment Card Industry Data Security Standards)
• Sarbanes-Oxley Act (SOX)
• Gramm-Leach-Bliley Act (GLBA)
• Data Privacy & Data Protection Act (DPDPA)

3. Safe Disposal of Devices

By securely wiping data from hard drive devices, companies can dispose of them safely through one or more of the following means:

• Recovering .`hard drives to recycle materials
• Donating complete computer systems that are usable
• Re-selling enterprise-level hardware
• Re-using internal storage devices

4. Lower Risk of Data Breach

Using established data destruction processes lowers the chance that any confidential data can be retrieved without authorization to access that data after the devices are disposed of.

5. International Methodology that is Recognized

The DoD data destruction standards originated as part of DoD security practices, and as a result, they are now recognized as the international standard for securely wiping data.

Why Manual Data Deletion Methods Are Not Reliable

Many users will try to delete data themselves before they turn to professional DoD data wipe software. Some manual methods of deleting data include:

• Deleting individual files from a hard drive
• Formatting the hard drive
• Moreover, performing a factory reset on the computer
• Using the built-in delete features of their operating system to delete files

Although basic methods seem to erase data, they fail DoD data destruction standards because of numerous limitations:

• Missing overwrite verification
• Lack of sanitizing previously hidden sectors or file areas
• Moreover, not provisioning compliance reports
• Not supporting audit-ready certificates
• Possibility of leaving behind recoverable data

Therefore, organizations that are subject to data privacy regulations face significant compliance and security challenges with respect to the limitations of using manual methods of data erasure.

Understanding Professional DoD Data Wipe Software

Professional DoD data wipe software is used by companies who need to securely and permanently wipe free space on hard drive. Professional data wipe software is a complete tool that performs the data-sanitizing function in accordance with recognized DoD data destruction standards.

Unlike basic formatting, professional DoD data wipe software securely overwrites original data and provides compliance documentation for your audit trail.

Companies use professional software to safely wipe all data from computer such as confidential business records, customer databases, healthcare documents, financial information, legal documents, and hard disk drives that are used to store these records before disposing of or reusing them.

BitRecover provides multiple global data wiping algorithms, including the standard and latest US DoD data wipe protocols.

Get BitRecover DoD Wipe Software to Wipe:

• Hard disk drive (HDD)
• Solid-state drive (SSD)
• NVMe drive
• USB flash drive
• External hard drive
• File and folder
• Unused drive space
• Drive partitions

However, one of the advantages of the software is the validation of the overwriting process. After wiping, the software verifies that all data was successfully removed according to accepted DoD standards.

DoD Destruction software produces the following documentation to support your organization’s compliance efforts during DoD data-sanitizing processes:

• Audit-ready reporting
• Validation logs
• Tamper-proof certificates of erasure
• Erasure summary reports
• A listing of the specific devices that were sanitized

So, these documents can be necessary for your organization to prove compliance with audit-related or IT asset-disposal-related regulations. They may also help your organization conduct an internal security audit.

Final Thoughts

Overall, in the above article, we have explained a complete guide on DoD data destruction standards. Therefore, the traditional wipe method can be risky. Use professional-grade DoD data wipe software to achieve proper compliance with that sanitization standard with secure overwriting. The BitRecover DoD data wipe tool helps organizations securely wipe their storage devices. It also verifies sanitization, generates compliance reports, and eliminates sensitive data with utmost certification.